for a constant flow control as proportional regulator working without auxiliary energy. Nominal value infinitely adjustable, lockable and lead sealable. Nominal value can be read off from the outside at any time. With isolation and ball valve for draining and filling.

Valve body, bonnet and regulator housing made of bronze. Inner parts made of brass resistant to dezincification (DZR). O-rings and diaphragm made of EPDM.